docs: def connect(self, **kwargs):
          """Connect to Google Compute Engine.
          """
          try:
              self.gce = get_driver(Provider.GCE)(
                  self.user_id,
                  self.key,
                  project=self.project,
                  **kwargs)
          except:
              raise ComputeEngineManagerException("Unable to connect to Google Compute Engine.")